London’s equities markets saw gains on the session Wednesday.

The FTSE 100 was 0.27 percent higher to 6,633 and the FTSE 250 gained 0.74 percent to 11,512.1.

In the banking sector, Northern Rock (LSE: NRK) added 32.29 percent to 273p after a hedge fund based in Monaco purchased a 4 percent stake in the troubled financial institution.

Other banks did not do as well on the day.

Barclays Bank (LSE: BARC; NYSE: BCS; TYO: 8642) was down 1.5 percent to 655.5p, while HBOS (LSE: HBOS) fell 3.09 percent to 926p after Lehman Brothers downgraded the bank from “overweight” to “underweight” and dropped its target share price from £10.46 to £10.28.

Voting shares in investment manager Schroders (LSE: SDR.L) added 5.71 percent to £15, while non-voting shares (LSE: SDRt.L) were up 4.27 percent to £12.94.

Business services group Experian (LSE: EXPN) had the worst day on the 100, where it fell 7 percent to 505p.

In the pharmaceuticals sector, meanwhile, Shire (LSE: SHP; NAS: SHPGY) dropped 2.1 percent to £12.15.

Reinsurer Benfield Group (LSE: BFD) was 2.83 percent lower to 724.25p, while construction group Severfield-Rowen (LSE: SFR) fell 2.65 percent to 552p.

Equities markets in London were lower in Friday trade.

The FTSE 100 fell 0.3 percent to 6,466.8 while the FTSE 250 was 0.02 percent lower to 11,037.4.

Miners were mixed.

Lonmin (LSE: LMI) added 7.39 percent to £36.49 on a rise in platinum prices and on the possibility that Xstrata (LSE: XTA) might be interested in bidding.

Gold miner Randgold (LSE: RRS; NAS: GOLD), meanwhile, was up 6.96 percent to £16.60.

On the other hand Antofagasta (LSE: ANTO) was 3.54 percent lower to 762.5p, while Kazakhmys (LSE: KAZ) fell 3.44 percent to £14.05 after a downgrade from “buy” to “neutral” from UBS (NYSE: UBS; SWX: USBN; TYO: 8657).

Food processor Tate & Lyle (LSE: TATE) was the biggest loser by far on the 100, plummeting 27.8 percent to 402.5p after it announced a “small” loss in the first half.

Over on the 250, broker Collins Stewart (LSE: CLST) was the best performer, adding 7.59 percent to 205.5p.

Other gainers on the 250 included reinsurer Benfield Group (LSE: BFD), which was up 7.41 percent to 290p.

Dana Petroleum (LSE: DNX) gained 6.31 percent to £11.62.

Asset managers New Star (LSE: NSAM) had the worst day on the 250 as it dropped 13.33 percent to 354p on statements from its chairman that it now faces a “challenging environment” after first half profits were up by 57 percent.

Also lower were PartyGaming (LSE: PRTY) with a decline of 5.17 percent to 27.50p and the London Stock Exchange (LSE: LSE), which dropped 4.75 percent to £16.43.

London’s markets saw gains Thursday as the FTSE 100 added 0.68 percent to 6,313.3 and the FTSE 250 gained 0.27 percent to 11,330.8 after the Bank of England‘s Monetary Policy Committee held interest rates steady as well.

Companies related to commodities filled all five top spots on the 100 and two of the top five places on the 250, including the best performance there.

Rio Tinto (LSE: RIO) had the best day on the 100 with a gain of 5.42 percent to £37.16.

Elsewhere in the mining sector Lonmin (LSE: LMI) was 4.71 percent higher to £33.79, while BHP Billiton (LSE: BLT; NYSE: BHP; ASX: BHP) gained 3.95 percent to £14.73 and Vedanta Resources (LSE: VED) was up 3.41 percent to £19.10.

In the oil sector, BG Group (LSE: BG; NYSE: BG) added 4.83 percent to 824.5p.

Over on the 250, gold miner Randgold (LSE: RRS; NAS: GOLD) was 6.21 percent higher to £12.99 for the best performance on the 250.

Tullow Oil (LSE: TLW; OTC: TUWLY) was 4.26 percent higher to 562.5p.

The worst performance on the day on the 100 came from electricity generator Drax Group (LSE: DRX), which fell 5.63 percent to 637.5p.

Banks were also lower, with Standard Chartered (LSE: STAN; SEHK: 2888) down 2.11 percent to £14.85 and Northern Rock (LSE: NRK) dropping 3.03 percent to 672p.

Elsewhere among financial services groups, insurer Legal & General Group (LSE: LGEN) fell 2.34 percent to 138p.

The worst performer on the 250 was reinsurer Benfield Group (LSE: BFD), which was 5.48 percent lower to 289p.

The markets in London also saw declines as the FTSE 100 fell 1.92 percent to 6,271.2 and the FTSE 250 was 2 percent lower to 11,225.5.

Shares in the financial services sector did not do very well for the most part on the 100.

Venture capital and private equity group 3i Group (LSE: III) was 5.8 percent lower to £10.56, while insurer Standard Life (LSE: SLET) fell 6.52 percent to 318.75p and hedge fund Man Group (LSE: EMG) was down 6.73 percent to 527p.

Not all in the financial services sector saw declines however.

Alliance & Leicester (LSE: AL) added 1.17 percent to £11.20 and insurer Benfield Group (LSE: BFD) gained 4.95 percent to 339p.

Insurance broker and risk management advisor Jardine Lloyd Thompson Group (LSE: JLT) had the best day on the 100 as it added 4.95 percent to 425p.

The best performer on the 250 was BSkyB (LSE: BSY), which gained 2.58 percent to 694.4p.

Other gainers included power transmitter National Grid (LSE: NG), which was 2.09 percent higher to 731.5p.

Chemicals group Reckitt Benckiser (LSE: RB) was up 1.5 percent to £27.74.

Defense contractor BAE Systems (LSE: BA; OTCBB: BAESY) added 0.9 percent to 440.25p after it said that first half profits were up a better-than-anticipated 27 percent on upgrades to its Bradley fighting vehicles for use by the US in Iraq and on the production of jet parts.

The biggest loser on the day on the 100 was miner Kazakhmys (LSE: KAZ), which was down 6.79 percent to £11.25.

In the pharmaceuticals sector, AstraZeneca (LSE: AZN; NYSE: AZN) dropped 3.5 percent to £24.30 on a safety review of its acid reflux drugs Nexium and Prilosec after two studies linked them to heart problems.

However, the Food and Drug Administration said that it had concluded on a preliminary basis that there is no increased risk to patients taking the drugs.